Add optional flag to enable access to extensions settings for non-local servers

[DenkingOfficial]

Adds --global-extensions-access flag to enable access for global servers

I think it's useful flag for some users who using a smartphone or laptop to connect to webui server and want to install or update extensions if they're sure that network they use is safe from other users.

USE AT YOUR OWN RISK

[simcop2387]

What might be nice for this would be the ability to pass in a trusted subnet or ip at the same time

--global-extensions-access=192.168.1.0/24,2603:6FE1:647F::/64

[DenkingOfficial]

@AUTOMATIC1111 implemented this in https://github.com/AUTOMATIC1111/stable-diffusion-webui/commit/ccf1a15412ef6b518f9f54cc26a0ee5edf458108

[sanasigma]

@AUTOMATIC1111 implemented this in ccf1a15

I tried adding those changes but now I'm getting this error ImportError: cannot import name 'StableDiffusionProcessing' from partially initialized module 'modules.processing' (most likelydue to a circular import) (/root/stable-diffusion-webui/modules/processing.py)

[DenkingOfficial]

@AUTOMATIC1111 implemented this in ccf1a15

I tried adding those changes but now I'm getting this error ImportError: cannot import name 'StableDiffusionProcessing' from partially initialized module 'modules.processing' (most likelydue to a circular import) (/root/stable-diffusion-webui/modules/processing.py)

Just pull the latest changes from github, I think it's not related to this flag and this PR processing.py wasn't changed for global extension access

[CJohnDesign]

I added this flag when I tried installing the Deforum extension and it had no effect

[Natotela]

I added this flag when I tried installing the Deforum extension and it had no effect

--enable-insecure-extension-access This ^ one ? worked for me

[CJohnDesign]

I fixed the issue I was having by deselected Gradio server on startup.